mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-13 22:47:26 +01:00
130 lines
3.6 KiB
Go
130 lines
3.6 KiB
Go
// Copyright 2020 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metal
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import (
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"fmt"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir/msl"
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)
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type shaderRpsKey struct {
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compositeMode graphicsdriver.CompositeMode
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stencilMode stencilMode
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}
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type Shader struct {
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id graphicsdriver.ShaderID
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ir *shaderir.Program
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fs mtl.Function
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vs mtl.Function
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rpss map[shaderRpsKey]mtl.RenderPipelineState
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}
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func newShader(device mtl.Device, id graphicsdriver.ShaderID, program *shaderir.Program) (*Shader, error) {
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s := &Shader{
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id: id,
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ir: program,
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rpss: map[shaderRpsKey]mtl.RenderPipelineState{},
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}
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if err := s.init(device); err != nil {
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return nil, err
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}
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return s, nil
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}
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func (s *Shader) ID() graphicsdriver.ShaderID {
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return s.id
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}
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func (s *Shader) Dispose() {
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for _, rps := range s.rpss {
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rps.Release()
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}
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s.vs.Release()
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s.fs.Release()
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}
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func (s *Shader) init(device mtl.Device) error {
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const (
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v = "Vertex"
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f = "Fragment"
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)
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src := msl.Compile(s.ir, v, f)
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lib, err := device.MakeLibrary(src, mtl.CompileOptions{})
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if err != nil {
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return fmt.Errorf("metal: device.MakeLibrary failed: %v, source: %s", err, src)
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}
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vs, err := lib.MakeFunction(v)
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if err != nil {
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return fmt.Errorf("metal: lib.MakeFunction for vertex failed: %v, source: %s", err, src)
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}
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fs, err := lib.MakeFunction(f)
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if err != nil {
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return fmt.Errorf("metal: lib.MakeFunction for fragment failed: %v, source: %s", err, src)
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}
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s.fs = fs
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s.vs = vs
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return nil
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}
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func (s *Shader) RenderPipelineState(device mtl.Device, compositeMode graphicsdriver.CompositeMode, stencilMode stencilMode) (mtl.RenderPipelineState, error) {
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if rps, ok := s.rpss[shaderRpsKey{
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compositeMode: compositeMode,
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stencilMode: stencilMode,
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}]; ok {
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return rps, nil
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}
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rpld := mtl.RenderPipelineDescriptor{
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VertexFunction: s.vs,
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FragmentFunction: s.fs,
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}
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if stencilMode != noStencil {
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rpld.StencilAttachmentPixelFormat = mtl.PixelFormatStencil8
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}
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// TODO: For the precise pixel format, whether the render target is the screen or not must be considered.
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rpld.ColorAttachments[0].PixelFormat = mtl.PixelFormatRGBA8UNorm
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rpld.ColorAttachments[0].BlendingEnabled = true
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src, dst := compositeMode.Operations()
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rpld.ColorAttachments[0].DestinationAlphaBlendFactor = operationToBlendFactor(dst)
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rpld.ColorAttachments[0].DestinationRGBBlendFactor = operationToBlendFactor(dst)
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rpld.ColorAttachments[0].SourceAlphaBlendFactor = operationToBlendFactor(src)
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rpld.ColorAttachments[0].SourceRGBBlendFactor = operationToBlendFactor(src)
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if stencilMode == prepareStencil {
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rpld.ColorAttachments[0].WriteMask = mtl.ColorWriteMaskNone
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} else {
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rpld.ColorAttachments[0].WriteMask = mtl.ColorWriteMaskAll
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}
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rps, err := device.MakeRenderPipelineState(rpld)
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if err != nil {
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return mtl.RenderPipelineState{}, err
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}
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s.rpss[shaderRpsKey{
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compositeMode: compositeMode,
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stencilMode: stencilMode,
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}] = rps
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return rps, nil
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}
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